package com.itheima.reggie.controller;


import com.baomidou.mybatisplus.core.conditions.Wrapper;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.reggie.common.R;
import com.itheima.reggie.dto.DishDto;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.DishFlavor;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishFlavorService;
import com.itheima.reggie.service.DishService;

import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cache.annotation.CacheEvict;
import org.springframework.cache.annotation.Cacheable;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.*;

import java.util.ArrayList;
import java.util.List;
import java.util.Set;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

/**
 * 菜品管理
 */

@Slf4j
@RestController
@RequestMapping("/dish")
public class DishController {

    @Autowired
    private DishService dishService;

    @Autowired
    private DishFlavorService dishFlavorService;

    @Autowired
    private CategoryService categoryService;

    @Autowired
    private RedisTemplate redisTemplate;

    /**
     * 新增菜品
     * @param dishDto
     * @return
     */
    @PostMapping
    public R<String> save(@RequestBody DishDto dishDto){
        log.info(dishDto.toString());
        dishService.saveWithFlavor(dishDto);
        //清理部分缓存数据
        String key="dish_"+dishDto.getCategoryId()+"_1";
        redisTemplate.delete(key);

        return R.success("新增菜品成功");
    }

    /**
     * 分页查询
     * @param page
     * @param pageSize
     * @param name
     * @return
     */
    @GetMapping("/page")
    public R<Page> page(Integer page, Integer pageSize, String name){
        //分页构造器
        Page<Dish> dishPage = new Page<>(page,pageSize);
        Page<DishDto> dishDtoPage=new Page<>(page,pageSize);
        //条件构造器
        LambdaQueryWrapper<Dish> queryWrapper=new LambdaQueryWrapper<>();
        queryWrapper.eq(name!=null,Dish::getName,name);
        queryWrapper.orderByDesc(Dish::getUpdateTime);
        dishService.page(dishPage,queryWrapper);

        //对象拷贝
        BeanUtils.copyProperties(dishPage,dishDtoPage,"records");
        List<Dish> records = dishPage.getRecords();


        //需要的records是dishdto
        //通过id获取categoryName
        List<DishDto> list = records.stream().map((item) -> {

              DishDto dishDto = new DishDto();

              BeanUtils.copyProperties(item,dishDto);
              Long categoryId = item.getCategoryId();
              Category category = categoryService.getById(categoryId);

              if(category!=null)
                  dishDto.setCategoryName(category.getName());
              return dishDto;
          }).collect(Collectors.toList());
          dishDtoPage.setRecords(list);


        return R.success(dishDtoPage);
    }

    /**
     * 根据分类ID查询菜品列表
     * @param id
     * @return
     */
    @GetMapping("/{id}")
    public R<DishDto> getById(@PathVariable Long id){
        DishDto dishDto= dishService.getByIdWithFlavor(id);
        return R.success(dishDto);
    }

    /**
     * 修改菜品
     * @param dishDto
     * @return
     */
    @PutMapping
    public R<String> update(@RequestBody DishDto dishDto){
        log.info(dishDto.toString());
        dishService.updateWithFlavor(dishDto);
        // 清理所有
//        Set keys = redisTemplate.keys("dish_*");
//        redisTemplate.delete(keys);

        //清理部分缓存数据
        String key="dish_"+dishDto.getCategoryId()+"_1";
        redisTemplate.delete(key);

        return R.success("修改菜品成功");
    }

    /**
     * 批量删除
     * @param ids
     * @return
     */
    @DeleteMapping
    @CacheEvict(value="dish",allEntries=true)
    public R<String> delete(@RequestParam List<Long> ids){
        //删除菜品对应口味
        LambdaQueryWrapper<DishFlavor> queryWrapper=new LambdaQueryWrapper<>();
        queryWrapper.in(DishFlavor::getDishId,ids);
        dishFlavorService.remove(queryWrapper);

        //删除菜品
        dishService.removeByIds(ids);

//清除所有
        Set keys = redisTemplate.keys("dish_*");
        redisTemplate.delete(keys);
        return R.success("删除成功");
    }

    /**
     * 起售/停售 批量起售/批量停售
     * @param status
     * @param ids
     * @return
     */
    @PostMapping("/status/{status}")
    public R<String> updateStatus(@PathVariable Integer status,
                          @RequestParam List<Long> ids){
        dishService.updateStatus(status, ids);


        //清除所有
        Set keys = redisTemplate.keys("dish_*");
        redisTemplate.delete(keys);


        return R.success("操作成功");
    }
    /**
     * 根据条件查询对应的菜品数据
     * @param dish
     * @return
     */
    @GetMapping("/list")
  //  @Cacheable(value = "dishCache",key = "dish.")
    public R<List<DishDto>> list(Dish dish){
        List<DishDto> list=null;

        String key ="dish_"+ dish.getCategoryId() + "_" + dish.getStatus();
        //redis
        list=( List<DishDto>)redisTemplate.opsForValue().get(key);

        if(list!=null){
            //存在
            return R.success(list);
        }
            //不存在

        LambdaQueryWrapper<Dish> queryWrapper=new LambdaQueryWrapper<>();
        queryWrapper.eq(dish.getCategoryId()!=null,Dish::getCategoryId,dish.getCategoryId());
        queryWrapper.eq(Dish::getStatus,1);

        queryWrapper.orderByDesc(Dish::getSort).orderByDesc(Dish::getUpdateTime);
        List<Dish> lis = dishService.list(queryWrapper);



         list=new ArrayList<>();
        for (Dish d : lis) {
            DishDto dishDto = new DishDto();
            BeanUtils.copyProperties(d,dishDto);
            Long dishId = d.getId();

            LambdaQueryWrapper<DishFlavor> qw=new LambdaQueryWrapper<>();
            qw.eq(DishFlavor::getDishId,dishId);
            List<DishFlavor> dishFlavors = dishFlavorService.list(qw);
            dishDto.setFlavors(dishFlavors);
            list.add(dishDto);
        }

        redisTemplate.opsForValue().set(key,list,60, TimeUnit.MINUTES);
        return R.success(list);
    }

}
